20476040 has 64 divisors (see below), whose sum is σ = 50122800. Its totient is φ = 7527936.

The previous prime is 20476019. The next prime is 20476051. The reversal of 20476040 is 4067402.

It can be written as a sum of positive squares in 8 ways, for example, as 3452164 + 17023876 = 1858^2 + 4126^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20475997 and 20476015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87764 + ... + 87996.

Almost surely, 2^20476040 is an apocalyptic number.

20476040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20476040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25061400).

20476040 is an abundant number, since it is smaller than the sum of its proper divisors (29646760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20476040 is a wasteful number, since it uses less digits than its factorization.

20476040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20476040 is about 4525.0458561212. The cubic root of 20476040 is about 273.5785162046.

The spelling of 20476040 in words is "twenty million, four hundred seventy-six thousand, forty".